Question to Ask the Workplace Doctors about disclosure of employee information:
What is the rule about an employer handing out my phone number, address, and birth date to a co-worker without my permission?
I get the impression you don’t want anyone at work to know anything about you. Probably that won’t be possible in today’s world. By taking a job you gave up some privacy already. But, I agree that unless your work requires it, there is no reason for anyone other than your employer and HR to have the other information.